A three-dimensional copper(II) coordination polymer featuring the 2,3-dioxyquinoxalinate(-2) ligand: Preparation,structural characterization and magnetic study |
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| Authors: | Konstantis F Konidaris Giannis S Papaefstathiou Guillem Aromi Simon J Teat Evy Manessi-Zoupa Albert Escuer Spyros P Perlepes |
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| Institution: | 1. Department of Chemistry, University of Patras, 265 04 Patras, Greece;2. Inorganic Chemistry Laboratory, Department of Chemistry, University of Athens, Panepistimiopolis, Zografou 15771, Greece;4. Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 2-400, Berkeley, CA 94720, USA |
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| Abstract: | The synthesis, single-crystal X-ray structure and magnetic properties of Cu3L2Cl2(DMF)4]n (1), where L2? is the 2,3-dioxyquinoxalinate(-2) ligand, are reported. The complex was prepared by the reaction of CuCl2 and 1,4-dihydro-2,3-quinoxalinedione (H2L′) under basic conditions using either solvothermal or normal laboratory techniques. Compound 1 is a 3D coordination polymer with an (82.10)-a, lig (LiGe) topology, containing the ligand in a novel 3.1111 (Harris notation) coordination mode. Variable-temperature and variable-field magnetic studies reveal that the ligand L2? propagates weak antiferromagnetic exchange interactions through its “quinoxaline” part. IR data are discussed in terms of the structural features of 1 and the coordination mode of L2?. |
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